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Title (Primary) Variability in microbial carbon isotope fractionation of tetra- and trichloroethene upon reductive dechlorination
Author Cichocka, D.; Imfeld, G.; Richnow, H.H.; Nijenhuis, I.;
Journal Chemosphere
Year 2008
Department ISOBIO;
Volume 71
Issue 4
Language englisch;
Keywords PCE; TCE; Dehalorespiration; Enrichment factors
Abstract The variability of stable carbon isotope fractionation upon reductive dechlorination of tetra- and trichloroethene by several microbial strains was investigated to examine the uncertainties related to the in situ application of compound specific isotope analysis (CSIA) of chlorinated ethenes. Carbon isotope fractionation was investigated with a set of microorganisms representative for the currently known diversity of dehalorespirers: Dehalococcoides ethenogenes strain 195, Desulfitobacterium sp. strain Viet 1, Desufuromonas michiganensis and Geobacter lovleyi sp. strain SZ and compared to the previous reports using Sulfurospirillum spp. and Desulfitobacterium sp. strain PCE-S. Carbon isotope fractionation of tetrachloroethene (PCE) and trichlorethene (TCE) was highly variable ranging from the absence of significant fractionation to carbon isotope fractionation (PC) of 16.7 and 3.5-18.9 for PCE and TCE, respectively. Fractionation of both compounds by D. ethenogenes strain 195 (PCE: epsilon C = 6.0; TCE: epsilon C = 13.7) was similar to the literature data for mixed cultures containing Dehalococcoides spp. D. michiganensis (PCE: no significant fractionation; TCE: epsilon C = 3.5) and G. lovleyi sp. strain SZ (PCE no significant fractionation; TCE: epsilon C = 8.5) generated the lowest fractionation of all studied strains. Desulfitobacterium sp. strain Viet 1 (PCE: X = 16.7) gave the highest enrichment factor for PCE. (c) 2007 Elsevier Ltd. All rights reserved.
ID 860
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=860
Cichocka, D., Imfeld, G., Richnow, H.H., Nijenhuis, I. (2008):
Variability in microbial carbon isotope fractionation of tetra- and trichloroethene upon reductive dechlorination
Chemosphere 71 (4), 639 - 648